When Is It Okay To Take Off Your Suit Jacket In A Meeting?

I really don't mind wearing a suit and tie. When you're walking around, they're perfect. When you're sitting down, in a meeting, they're less perfect. I find that jacket always bunches up, and since most meeting rooms are at a temperature for shirt sleeves, I find that the extra thick layer of suit jacket always leaves me feeling a little bit warm.

However, you can't just loosen your tie, undo the top button of your shirt, take your jacket off, and roll your sleeves up in the first few minutes of a meeting.

In fact, I'm not even sure you can do any of those things in most meetings.

This normally leaves me with an internal dialogue as I sit across the table in a discussion: "Okay, we've been talking for fifteen minutes... Can I take my jacket off now? Or do I have to wait until someone more senior does so first? Or do I have to wait for a break in the conversation? Or should I wait until there is a break, and then just come back without my jacket, like nothing happened?"

Tired of this endless internal debate, I threw the question to Twitter and got some good responses.

Brad Buset and Greg"Blazer" Blazina both agreed that if you're the client, you can take your jacket off.

Buset also adds that if it is an internal meeting, and the senior colleagues their jacket off first, then it is appropriate.

I still feel like this leaves a lot of times when I'm going to be left sitting down with a suit jacket on.

Any other ways to justify taking it off in a meeting?

Suit-related etiquette tips also appreciated.